Save guides, add subjects and pick up where you left off with your BBC account. A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word ...

Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene ...

Types of Triangle Chart Patterns The following diagram shows the three basic types of triangle chart patterns: the ascending, descending, and symmetrical triangles. We go into more detail about ...